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Type A28 Safety Valve

Safety Valves, angle type

Low lift safety valve

Standard safety valve for fluids

Metal to metal seated, with lift device

Connection end acc. to NPT/PT/G thread

Applications:

Provided as safety device for protection against excessive pressure in pressure vessels.

"Approved for  gases, vapours and fluids."

Working temperatures: ≤ 300℃

Standards Compliance:

Design and Manufacture: GB/T 12241-2005, GB/T 12243-2005

Face to Face(end to end): JB/T 2203-1999

Test and Inspection: GB/T 12243-2005


Material for main parts

NOName of partA21H-C/A21F,KA21Y-C MaterialA21W-P/A21F-P /KA21Y-P MaterialA21Y-R Materials
1BodyHT350304316
2Nozzle35304316
3Adjust ring2Cr13304316
4Disc2Cr13304316
5Spring50CrVA50CrVA coated teflon50CrVA coated teflon
6Stem2Cr132Cr13304
7Adjusting bolt452Cr13304
8CapZG200-400ZG200-400304
Sealing surface of material "H" depositing D507, "W" same as body, "Y" depositing stellite


Essential:

Valves are delivered at a set pressure, therefore when ordering 

Please confirm set pressure, medium and temperature

TS

Safety accessory and Safety protection device 

Manufacture License of Special Equipment, People's republic of China


Dimensions(mm)

DNdoRcLL1GH
15101/2"37653/4"196
20123/4"40701"215
25151"45781 1/4"234
32201 1/4"55901 1/2"302
40251 1/2"671052"326
50322"761152 1/2"348
65402 1/2"1101453"370
80503"1101454"410

Remark: NPT, PT, G thread are accepted


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A28H

Full Lift with Plain Lever